Basically every avatar I use (particularly furry avatars, but this issue happens with EVERY avatar I've tried) have issues with the basic 'face tracking' that the desktop webcam has. Closing the mouth and in particular doing "ou" or pucker-lip style face shapes without talking makes the bottom jaw shove through the face - or if the face tracking decides it's being difficult.

Clip of this in action: https://www.twitch.tv/kudalyn/clip/PunchyIgnorantTruffleTakeNRG-AInYsC-PZoVw9URb

I do enjoy using the Desktop Webcam for not just occasionally 'vtubing' - but hanging out at conventions or events without having to be in VR constantly. This really should be fixed to encourage even more desktop webcam usage. It just looks plain awkward currently, for even when just relaxed or not talking, the jaw clips.

This has been an issue since the VRC desktop was in beta and behind VRC+.